Serial port Items tagged with Serial port

I am doing a project using AT Command. I am using Nokia 6680 set. I can communicate with my 6680 via USB by Hyperterminal or Proteus VSM. But I cant communicate via Serial port. I think there must be an initializaig command for enable FBUS. But I dont know that. thats why i cant make communication via Serial port.PLZZZ help me out.10x.